Accused Pennsylvania cop killerEric Frein has been charged with two additional counts of terrorism, stemming from a letter officials say he addressed to “Mom and Dad” that was found during a search of his computer.

“I am sorry,” the letter read, in part. “You guys are great parents, I am just not a good son. I squandered so much opportunity and support and rarely tried my best at anything.”

The letter appears to have been written in December of last year and amended in October of this year during the 48-day manhunt for the suspect, officials said.

“Our nation is far from what it was and what it should be,” it read. “I have seen so many depressing changes made in my time that I cannot imagine what it must be like for you. There is so much wrong and on so many levels only passing through the crucible of another revolution can get us back the liberties we once had. I do not pretend to know what the revolution will look like or even if it would be successful.

“Tension is high at the moment and the time seems right for a spark to ignite a fire in the hearts of men. What I have done has not been done before and it felt like it was worth a try.”

Based on the letter calling for revolution, prosecutors said his alleged shooting of two state troopers was “intending to influence the policy of government."

The letter ends, “I love you. Please forgive me of my many faults. And thanks for putting up with me for so long.”

Frein, who is being held without bail and has not entered a plea, had already been charged with alleged offenses that include murder and possession of weapons of mass destruction (two bombs). He is due back in court next month.

A second state trooper shot in the alleged attack survived his injuries.